A solid pyramid with a square base with side 12cm and height 25 cm is made of metal. the metal is melted to form spherical ball bearings of radius 7mm., how many solid pyramids are needed to form 2490 ball bearings?
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2
Answer:
3
Step-by-step explanation:
volume of 1 sphere = 1.43 cm^3
2490 balls = 2490 × 1.43
= 3578.95 cm^3
1 pyramid volume = 1200 cm^3
1200x = 3578.95
x = 2.9 = 3
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